Back frame

Abstract

Disclosed is an example of a back frame in which an electric wire such as a harness is routed, in consideration of the routing property of the harness.SOLUTION: The flange portion 31 provided on the rear end side of the first side frame 3 is provided with a recessed portion 32 recessed from the tip in the extending direction in the direction opposite to the extending direction. Accordingly, in the back frame 1, interference or the like between the harness 11A and the first side frame 3 can be easily avoided. As a result, the assembling worker can easily connect the connector 11B and the connector 11C.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a back frame for a vehicle seat. [Background technology]

[0002] For example, the back frame described in Patent Document 1 is a rectangular frame having two side frames, an upper frame, and a lower frame. The two side frames extend in the vertical direction. The upper frame and lower frame extend in the seat width direction and connect the two side frames. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2022-167380 Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure discloses an example of a back frame in which electrical wires such as harnesses are routed, the back frame being designed with ease of routing the harnesses in mind. [Means for solving the problem]

[0005] It is desirable that the back frame of the vehicle seat have at least one of the following constituent features, for example. That is, the constituent elements are a first side frame (3) extending in the vertical direction, a second side frame (5) arranged at a position offset in the seat width direction from the first side frame (3), the second side frame (5) extending in the vertical direction, an upper frame (7) extending in the seat width direction and connecting the upper end side of the first side frame (3) with the upper end side of the second side frame (5), a lower frame (9) extending in the seat width direction and connecting the lower end side of the first side frame (3) with the lower end side of the second side frame (5), a wall-shaped flange portion (31) provided at the rear end side of the first side frame (3) and extending toward the second side frame (5), the flange portion (31) having a recess (32) recessed from the tip of the extending direction in the opposite direction to the extending direction, and a harness (11A) arranged in a position close to the recess (32).

[0006] This makes it possible to easily avoid interference between the harness (11A) and the first side frame (3) in the back frame, and as a result, it becomes possible for an assembly worker to easily assemble the harness (11A) to the back frame.

[0007] The back frame may have the following configuration, for example. That is, it is desirable to provide mounting portions (17A, 17B) provided on the flange portion (31) to which other components are attached.

[0008] When an imaginary line that passes through the bottom (32A) of the recess (32) and is parallel to the extension direction of the first side frame (3) is defined as an old tip line (L1), it is desirable that at least a portion of the mounting portions (17A, 17B) overlap with the old tip line (L1).

[0009] Furthermore, the other component is preferably a cushion body (15) in which the seat pad, the surface part, and the attached part (15A) attached to the attachment parts (17A, 17B) are integrated. Incidentally, the symbols in the parentheses above correspond to the specific configurations and the like described in the embodiments to be described later. The present disclosure is not limited to the specific configurations and the like indicated by the symbols in parentheses above. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 2 is a diagram showing a back frame according to the first embodiment. [Figure 2] FIG. 2 is a diagram showing a back frame according to the first embodiment. [Figure 3] FIG. 3 is a view showing an electric motor portion of a back frame according to the first embodiment. [Figure 4] FIG. 3 is a view showing an electric motor portion of a back frame according to the first embodiment. [Figure 5] 3A and 3B are views showing a back frame and a side cushion body according to the first embodiment. [Figure 6] 3A and 3B are views showing a back frame and a side cushion body according to the first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] The following "embodiments of the invention" are examples of embodiments that fall within the technical scope of the present disclosure. In other words, the invention-specific matters described in the claims are not limited to the specific configurations and structures shown in the following embodiments.

[0012] This embodiment is an example in which the back frame according to the present disclosure is applied to a seat (hereinafter referred to as a vehicle seat) mounted on a vehicle such as a car. Arrows and diagonal lines indicating directions are added to each figure to make it easier to understand the relationship between the figures and the shapes of components or parts.

[0013] Therefore, the back frame is not limited to the direction indicated in each drawing. The direction indicated in each drawing is the direction when the vehicle seat according to the present embodiment is assembled to a vehicle. Drawings indicated with diagonal lines do not always represent cross-sectional views.

[0014] At least one of a member or portion described with a reference numeral is provided unless otherwise specified, such as "one." In other words, unless otherwise specified, two or more of the member may be provided. The back frame shown in the present disclosure includes at least one of the components, such as the member or portion, described with a reference numeral, and the structural portion shown in the drawings.

[0015] (First embodiment) <1.Back frame overview> As shown in Fig. 1, the back frame 1 is a substantially rectangular frame that forms the framework of the seat back. The seat back supports the back of a seated occupant. The back frame 1 is rotatably connected to the rear end of the cushion frame (not shown).

[0016] The back frame 1 includes at least a first side frame 3, a second side frame 5, an upper frame 7, and a lower frame 9. The first side frame 3 and the second side frame 5 are strength members that extend substantially in the vertical direction.

[0017] The second side frame 5 is disposed at a position offset in the seat width direction (to the left in FIG. 1) with respect to the first side frame 3. The upper frame 7 is a strength member that extends in the seat width direction and connects the upper end sides of the first side frame 3 and the second side frame 5.

[0018] The lower frame 9 is a strength member that extends in the seat width direction and connects the lower end sides of the first side frame 3 and the second side frame 5. In this embodiment, the first side frame 3, the second side frame 5, the upper frame 7, and the lower frame 9 are made of metal, and these frames are joined by laser welding.

[0019] As shown in Fig. 2, an electric motor 11 is provided on the lower end side of the first side frame 3. The electric motor 11 supplies rotational force to the recliners 13A and 13B. The recliners 13A and 13B rotatably connect the back frame 1 to the cushion frame.

[0020] When the electric motor 11 is operated, the back frame 1 rotates around the recliners 13A, 13B relative to the cushion frame in the front-rear direction of the seat. The electric motor 11 is fixed to the first side frame 3.

[0021] <2. Detailed configuration of side frames, etc.> The shape of the first side frame 3 and the shape of the second side frame 5 according to this embodiment are substantially symmetrical with respect to an imaginary line passing through the center in the seat width direction. The following description will be given regarding the first side frame 3.

[0022] 3, a flange portion 31 is provided on the rear end side of the first side frame 3. The flange portion 31 is a wall-shaped portion that extends from the rear end side toward the second side frame 5 side (to the right in this embodiment).

[0023] Therefore, the cross section of the first side frame 3 is substantially L-shaped or substantially C-shaped. A recess 32 is provided at the tip of the flange portion 31 in the extending direction (the right end in this embodiment) and in the vicinity of the electric motor 11.

[0024] The recess 32 is a recess that is recessed in the opposite direction (leftward in this embodiment) to the extending direction of the flange portion 31. A harness 11A is routed in a position close to the recess 32. The harness 11A is an electric wire or the like that supplies power to the electric motor 11.

[0025] An end of the harness 11A is electrically connected via a connector 11B to a connector 11C of the electric motor 11. At least a portion of the connector 11B and the connector 11C overlaps with the recess 32 as shown in FIG.

[0026] Specifically, at least a portion of connector 11B and connector 11C projected onto a virtual plane (in this example, the plane of the paper in Figure 4) perpendicular to the fore-and-aft direction of the seat overlaps with the projected recess 32 so as to be located within the recess 32 projected onto the projection plane.

[0027] Mounting portions 17A and 17B are provided on the first side frame 3. The mounting portions 17A and 17B are locations to which the mounted portion 15A (see FIG. 6) of the side cushion body 15 (see FIG. 5) is mounted.

[0028] The side cushion body 15 constitutes a cushion portion on the widthwise end side of the seat back. The side cushion body 15 is an integrated unit of a seat pad, a surface portion, and a mounting portion 15A.

[0029] 4, at least a portion of the mounting portions 17A, 17B overlaps with the old tip line L1. The old tip line L1 is an imaginary line that passes through the bottom 32A of the recess 32 and is substantially parallel to the extension direction of the first side frame 3. The bottom 32A refers to the position of the recess 32 that is farthest from the second side frame 5.

[0030] 3. Features of the back frame according to this embodiment A flange portion 31 provided on the rear end side of the first side frame 3 is provided with a recessed portion 32 recessed from the tip in the extension direction in the opposite direction to the extension direction (see FIG. 4).

[0031] This makes it possible to easily avoid interference between the harness 11A and the first side frame 3 in the back frame 1. As a result, it becomes possible for an assembly worker to easily connect the connector 11B and the connector 11C.

[0032] The flange portion 31, excluding the recessed portion 32, extends to a position beyond the former tip line L1 (see FIG. 4). This can increase the joint area between the first side frame 3 and the lower frame 9. As a result, it can be possible to firmly join the first side frame 3 and the lower frame 9.

[0033] (Other embodiments) The harness 11A according to the above-described embodiment is a harness connected to the electric motor 11. However, the present disclosure is not limited to this. That is, the present disclosure may be a harness connected to, for example, a seat air conditioning system.

[0034] In the above-described embodiment, the side cushion body 15 is the “other component” attached to the attachment portions 17A and 17B. However, the “other component” attached to the attachment portions 17A and 17B according to the present disclosure may be a component other than the side cushion body 15.

[0035] In the above-described embodiment, the recesses are provided in the first side frame 3 and the second side frame 5 (see FIG. 2). However, the present disclosure is not limited to this. That is, it is sufficient for the present disclosure that the recesses 32 are provided at least in a position close to the electric motor 11, for example.

[0036] In the above-described embodiment, at least a portion of the mounting portions 17A, 17B overlaps with the old tip line L1. However, the present disclosure is not limited to this. That is, the present disclosure may be configured, for example, such that the old tip line L1 is located on the second side frame 5 side of the mounting portions 17A, 17B, or such that the old tip line L1 is located on the opposite side of the mounting portions 17A, 17B from the second side frame 5.

[0037] In the above-described embodiment, the vehicle seat according to the present disclosure is applied to a vehicle. However, the application of the invention disclosed in this specification is not limited thereto. That is, the present disclosure can also be applied to seats used in vehicles such as railway cars, ships, and aircraft, as well as stationary seats used in theaters, homes, etc.

[0038] Furthermore, the present disclosure is not limited to the above-described embodiments as long as it conforms to the spirit of the disclosure described in the above-described embodiments. Therefore, the present disclosure may be a configuration in which at least two of the above-described embodiments are combined, or a configuration in which any of the components illustrated or described with reference numerals in the above-described embodiments is eliminated. [Explanation of symbols]

[0039] 1... Back frame 3... First side frame 5... Second side frame 7... Upper frame 9... Lower frame 11... Electric motor 11A... Harness 11B... Connector 11C... Connector 13A... Reclining chair 15... Side cushion body 15A… Attached part 17A... Mounting part 31... Flange 32... Recess

Claims

1. In a back frame of a vehicle seat, a first side frame extending in the vertical direction; a second side frame disposed at a position offset in a seat width direction relative to the first side frame and extending in a vertical direction; an upper frame extending in the seat width direction and connecting an upper end side of the first side frame and an upper end side of the second side frame; a lower frame extending in a seat width direction and connecting a lower end side of the first side frame and a lower end side of the second side frame; a wall-shaped flange portion provided on a rear end side of the first side frame and extending toward the second side frame, the flange portion having a recess recessed from a tip end in the extending direction in a direction opposite to the extending direction; a harness routed in a position close to the recess; A back frame with.

2. The back frame according to claim 1 , further comprising a mounting portion provided on the flange portion to which other components are attached.

3. When a virtual line that passes through the bottom of the recess and is parallel to the extension direction of the first side frame is defined as an old tip line, The back frame according to claim 2 , wherein at least a portion of the attachment portion overlaps the old tip line.

4. The back frame according to claim 3, wherein the other component is a cushion body in which a seat pad, a surface portion, and a receiving portion that is attached to the attachment portion are integrated.

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